Does Muscle Weigh More Than Fat?!?

When weighing in for our Biggest Loser Work Competition, the weight keeper said "wow, your muscle must weigh a lot... you don't look like you weigh anywhere near that!".... Hmmmm... I know he meant well, but I've lost pounds with P90X, and this wasn't the low blow I needed... LOL! I have gained a LOT of muscle... muscle in places I'm not sure I've ever had them (triceps!)... But I'm consistently dropping weight and inching towards my goal... So... With that in mind... Does muscle really weigh more than fat?!?!

As you can see, the 5 lbs. of fat is much bulkier than the 5 lbs. of muscle, but five pounds is still five pounds. Muscle does not weigh more than fat.
Fat is bulky and lumpy so if you carry an extra five pounds of fat, you'll be lumpier than with five pounds more muscle. A five pound pile of fat will take up more space (volume) than a five pound pile of muscle; but five pounds is still five pounds, so for those of you that don't "get" English, you cannot say one thing weighing a certain weight weighs more than another thing at that same weight. It's a common joke to play on an 8-year old. The correct way to state the muscle weighs more than fat scenario is, "Muscle is heavier by volume than fat."
A woman weighing 150 pounds with 19% fat will look much smaller (and be much healthier) than a woman at 150 pounds with 35% fat. They weigh the same, yet the composition is different. Because muscle is more dense than fat the person with less fat and more muscle will look smaller.
Stop being so obsessed with body weight and start paying attention to body composition. How much body fat do you have compared to muscle? Simply seeing how much you weigh isn't very helpful.